Threats Of Violence Stop Insults
According to an April 24, 2006 Reuters article entitled "Brothel made to remove Saudi, Iran flags", the Muslim protest in Cologne started off sensibly but then became threatening. There was no legal requirement to remove or cover the flags, nor was it a crime to display the flags. Nonetheless, Muslim sensitivities had to be catered to, so as not to insult them.
The Reuters article is filed in the category "Oddly Enough."